Insulator-support.



E. 0. SESSIONS. INSULATOR SUPPORT. APPLIUATION FILED JAIL-3, 1910.

Patented Dee/26,1911.

2 SHEETS-SHEET 1. 21 .2.

fi 1 e all? da Inven n1" 1- Edsurl El. Bessruns WITITE 5' s e 5 UNITED STATES PATENT cr mes.

1 EDSON 0. sessions, or CHICAGO, rumors, ASSIGNOR or ONE-HALF IO FAY woomviANsEE, or-cnroaoo, ILLINOIS.

INSULATORPSUPPORT.

Specification of Letters Patent. Pa tented Dec. 26, 1911.

epplicationfiled January 3, 1910. Serial No. 536,183.

of which-the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to insulatorsupports, and has-special reference toa formof support in .which'a pin of non-conducting material ,is attached .to a retaining member in order to cause. the current to pass .through the longest possible path through the insulator in casesof electrical discharge, areing, or. puncturingvof the insulator.

When a high tension current is passed through a conductor connected to an insulator, the maximum eificiency of the insulal or is obtained only when the current is required to pass through the petticoat of' the insu lator before a discharge can be made. prior art it has been customary to employ an insulator support which is integral with the retaining member or clamp by means of which the insulator is attached to a pipe, rod or other main support. The member ordinarily used has a projecting portion which is wound with cord, and the suitably threaded insulator is attached to the retaining member by means of engaging the threaded portion of the insulator with this cord. It

will beevident that, inasmuch as the retaining member and the projecting portion integral therewith are made of metal, the current from the conductor will pass through the body of the insulator to this projecting portion contained within the insulator and located comparatively near to-the conductor.

-In my invention I employ a pin of wood or other non-conducting material which is attached to the metallic retaining member and is provided with threads so that the insulator may be directly screwed onto this pin. It will now be clear that when a discharge made from the high tension-conductor the current must travel a much far-' ther distance through the insulator before it is possible. to makea discharge to the In the metallic retaining member. Theinsulabor support ,of my invention consists ordinarily of a wooden pin with a metallic retaining member, to which this pin is attached by means of exerting pressure on a clip-shaped portion .of-the member in order to cause the pin to be gripped in position at its lower end. Theseand other advantages of my invention will be more apparent by reference to the accompanying drawings, in which Figure 1 is a vertical section through the insulatorand the insulator support, showing the method of attachment to the main support. Fig. 2 is a sideelevation of the parts shown in Fig. 1. Fig. 3 is an elevation and partly sectional view showing thev insulator and a modification of the clamping member. F 4 isya fragmentary side elevation of the parts shown in Fig. 3. Fig. 5 is a fragmentary sectionalview showing the method of attachment of the pin to the retaining .member. Fig. (3 is a vertical ,sectionalview showing a modification of my support especially adapted fortelephone and telegraph wire insulators. Fig. 7 is a vertical sectional view showing a further modification of a support for telephone and telegraph wirc'insulators.

As shown in Figs. 1 and 2, a clamping member 1 is provided with a cup-shaped portion 2. This clamp is preferably made of malleable iron, steel or other ductile metal.

The clamp 1 is attached to a main support 3, which may bea pipe, rod or. other similar part, by means of the U-shaped strap 4 which passes through the openings 5, 5 in the clamp 1, and is held in position by means of the nuts 6, 6.

' A wooden pin 7 having a portion 8 which is outwardly tapered toward its end, fits in lines in Figs. 1 and 8. Inasmuch as the porshown in dotted lines in F ig. 5 and in full V in the art.

' engages the main support 3 on one side, and

the cup-shaped portion 26 in exactly the tion 8 of the pin Y is outwardly tapered toward its end, it will be evident that the pin 7 is now securely held 1n position. I

The pin 7 is provided wlth the threaded portion 9 wlth which the nsul tor 10 is .en gaged. This insulator may be or any 0.; the well known forms. As shown in Figs. 1, 2 and 3, the Insulator 10 may have a groove 11' in which the conductor may be attached. The Petticoat 12 of the insulator may proect downwardly and occupy a position 121 closing a portion of the eupshaped memoer 2 of the clamp 1.

In the modification shown in Figs. 3 and 4, the clamp consists of a member 18 whi l a second member 1% which it on the other side. The members 13 and list are connected by the bolts 15, which are vided with nuts 16.

It will be clear that according to the construction which I employ, any arcing which takesplace will occur between the petticoa't member 12 of the insulator and cup portion 2 of the clamp.- linthis way the current will be obliged to-pass through large part of the insulator 10 before discharge to the clamping member can talre place.-

I have previously described a form of insuFea-tor support in which a clamping member is used. In Figs. 6 and 7 further modi" fications of my supportv are shown, these modifications being particularly adapted for use in connection with telephone and telegraph wire. I

In Fig. 6 the retaining member consists of a lower tubular portion 17 which is inserted in a suitable hole bored in the cross-arm 18 of a telephone or telegraph pole. The upper part of the tubular portion 17 of the retaining member consists of a horizontal. wall 19, which also forms the bottom of the eupshaped portion 20. in order to prevent the retaining member from slipping down wardly through the hole in the cross-arm 18, a flange 21 is provided which acts as an abutment member against the upper surface of the cross-arm 18. The pin 7 is secured in same way as described above.

It will be noted that the petticoat 22 of the insulator 23 projects downwardly over the cup-shaped portion 20 of the retaining member. \This is a preferred form of insulator to be used in connection with my in sulator support, inasmuch as water is there by prevented from reaching the pin 7 and causing the same to swell. In order to further preserve the pin 7 againstaction of the weather I prefer to treat it with some one of the preservatives which are well known In Fig. 7 another modification is shown, whlch is also particularly adapted for telephone and telegraph work. In this case a. downwardly projecting rod member 24' is formed integral with the cup-shaped portion 20 of the retaining member. The rod fi l is threaded on. its lower end, and after being inserted in a suitable hole in the crossarm 18 it is secured in position'by means of the nut 25, in connection with which the washer 2G, is providedflln this way'ittvill be erident'that the retaining member is securely fastened in position.

'Lany changes could be inadein theder. tailed constru the device which. I have desoribeu without departing from the it of my invention. at is m as new and. desire to cover by United o es hetters Patent is:

.in iii-isolator support which consists of, a retaining member in the form of a cup with a closed bottom with an inward y taporing wall, insulating membe havring outwardly tapering end engagingv in said cup, said insulating member adapted to support an insi'ilator.

2. An insulator support comprising a retaining member in the form of a cup with a closed bottom with an inwardly tapering wall, and a wooden pin having an outwardly tapering end engaging in said cup, said pin adapted to support an insulator.

in insulator support comprising a supporting member having a cup-shaped portion with an inwardly tapering wall, and a wooden pin having an outwardly tapering end engaged by said cup-shaped portion and having a shoulder resting on the rim of said cup-shaped portion, the other end of saio. pin being adapted to receive and support an insulator.

4-. An insulator support comprising a supporting member having a cup with. a closed bottom and an inwardly tapering wall. and a wooden pin having an out wardly tapering" end engaging in said cup having a shoulder resting on the rim of said cup-shaped retainer, and a pettieoat insulator carried upon said insulator pin and extending downwardly over said retainer. for a-considerabledistance so that some part of this retainer will be considemhl; nearer the lower edge of-said etticoat, lnsulator than any part of such insulator pin in order that any electrical discharges from said lower edge will proceed to the side of the retainer at a distance from the top thereof thus keeping the sparks away from the insulator pin. v I K I I EDSON 0. SESSIONS.

Witnesses:

HENRY M. HUXLEY, J. S. Anew 

